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Thread: Power USB hub from psu

  1. #1
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    Power USB hub from psu

    I have seen that several people are powering USB hubs off the 5v line from thier psu. is there any beneift of doing this over a bus powered hub? Does running the hub right off the psu draw more power than a bus powered hub would?

    I have been looking for a 12v -> 5v adapter that can handle 2 amps for my hub, but cant find any. I might run it off my psu, but i dont want any unneeded draw on the psu.
    System: AMD Duron 1200+ , 512 MB ram , usb sb mp3+ , Tview 7" touchscreen , M1-ATX PSU , Slot Load iMac DVD-Rom , 40 GB laptop HDD, netgear USB 802.11g

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    Parts Needed: USB GPS

  2. #2
    See me in my wet t-shirt. stevieg's Avatar
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    Quote Originally Posted by meyer64
    I have seen that several people are powering USB hubs off the 5v line from thier psu. is there any beneift of doing this over a bus powered hub? Does running the hub right off the psu draw more power than a bus powered hub would?

    I have been looking for a 12v -> 5v adapter that can handle 2 amps for my hub, but cant find any. I might run it off my psu, but i dont want any unneeded draw on the psu.
    It wont use any more power than running off the bus. You are best running it off the PSU and putting a suitable fuse in-line
    Ford Focus MP3 : www.stevieg.org/carpc Blog Updated 29 January 2009!
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  3. #3
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    my hub is capable of being powered externally or by the bus. if the power is comming from the psu anyway, what difference does it make?
    System: AMD Duron 1200+ , 512 MB ram , usb sb mp3+ , Tview 7" touchscreen , M1-ATX PSU , Slot Load iMac DVD-Rom , 40 GB laptop HDD, netgear USB 802.11g

    Progress: Installation: 90% Dash fabrication: 80%

    Parts Needed: USB GPS

  4. #4
    See me in my wet t-shirt. stevieg's Avatar
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    Quote Originally Posted by meyer64
    my hub is capable of being powered externally or by the bus. if the power is comming from the psu anyway, what difference does it make?
    There is only a certain amount of current that you can draw from the bus.
    Ford Focus MP3 : www.stevieg.org/carpc Blog Updated 29 January 2009!
    Car PC Status: Complete - Undergoing Software Redevelopment

  5. #5
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    So does anyone know how to power a powered USB hub off a molex or some other line from the power supply rather than through the bus? I got a hub that can pull either from the bus or a power line and I'd prefer to use the power line because bus power sucks, I've already maxed it out using too many devices and I'm hoping drawing straight from the Opus rather than through the bus will help.

  6. #6
    See me in my wet t-shirt. stevieg's Avatar
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    Quote Originally Posted by maxxell
    So does anyone know how to power a powered USB hub off a molex or some other line from the power supply rather than through the bus? I got a hub that can pull either from the bus or a power line and I'd prefer to use the power line because bus power sucks, I've already maxed it out using too many devices and I'm hoping drawing straight from the Opus rather than through the bus will help.
    Yes what does it say is the power in (or what is the wall adapter voltage)
    Ford Focus MP3 : www.stevieg.org/carpc Blog Updated 29 January 2009!
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  7. #7
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    could i connect my usb hub to my ITPS?

    thanks.
    2001 Acura CL traded for a 2006 Subaru Legacy GT
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  8. #8
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    Quote Originally Posted by stevieg
    Yes what does it say is the power in (or what is the wall adapter voltage)
    Couldn't tell ya. I'm on break so I'm not home. The box for the hub is home. Why does that matter, by the way?

  9. #9
    My man uses Levitra. Peoples's Avatar
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    if its not 5 or 12 volts, then your **** out of luck
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    Lilliput; XPC/FLEX mobo; 1.7 ghz P4 Mobile;512 DDR; 160 gb HDD; opus 150; slot usb dvd-rw
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  10. #10
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    I was thinking about something similiar... I have M1-atx and one dc-dc psu (not using now) .. what about power usb hub from the second non cranking suitable ps?

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